Surface density enhancement of gold in silica film under laser irradiation at 355 nm

In order to understand the damage mechanisms inside the optics of the high power laser facilities, a model sample has been prepared by introducing gold nanoparticles into a silica film. The mean diameter of the gold clusters is 2.5 nm. Different parts of the sample were irradiated at wavelength 355...

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Bibliographic Details
Published in:Applied physics letters 2004-07, Vol.85 (4), p.591-593
Main Authors: Jonnard, P., Dufour, G., Rullier, J.-L., Morreeuw, J.-P., Donohue, J.T.
Format: Article
Language:English
Subjects:
DENSITY
GOLD
IRRADIATION
LASERS
MATERIALS SCIENCE
NANOSTRUCTURES
PARTICLES
Physics
Plasma Physics
SILICA
THIN FILMS
X-RAY PHOTOELECTRON SPECTROSCOPY
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Summary:In order to understand the damage mechanisms inside the optics of the high power laser facilities, a model sample has been prepared by introducing gold nanoparticles into a silica film. The mean diameter of the gold clusters is 2.5 nm. Different parts of the sample were irradiated at wavelength 355 nm and fluences up to 1 J/cm2. By looking with x-ray photoelectron spectroscopy at the intensity of the Au 4f peak relative to that of the Si 2p peak, a surface Au density enrichment is observed. We interpret this as indicating that the gold atoms migrate toward the surface upon the laser irradiation.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1777391